彩色圆环旋转的HTML5网页加载特效

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引入JS
- 3.0.0 2.2.0 2.1.4 2.1.3 2.1.2 2.1.1 2.1.0 2.0.3 2.0.2 2.0.1 2.0.0 1.12.0 1.11.3 1.11.2 1.11.1 1.11.0 1.10.2 1.10.1 1.10.0 1.9.1 1.9.0 1.8.3 1.8.2 1.8.1 1.8.0 1.7.2 1.7.1 1.7 1.6.4 1.6.2 1.6.1 1.4.4 1.4.3 1.4.2 1.4.1 1.4.0
- 1.7.3 1.7.2 1.7.1.0 1.7.0.0
- 2.0.0-beta.0 2.0.0-alpha.55 1.5.0-rc.0 1.4.8 1.4.0 1.3.20 1.2.29 1.1.5 1.0.8
- 1.8.3 1.7.0 1.6.0 1.5.2 1.4.4 1.3.3 1.2.4 1.1.7
- 1.10.4 1.9.7 1.8.10 1.7.8 1.6.3 1.5.4 1.4.6 1.3.3
- core1.6.0 core-compat1.6.0 core1.5.2 core-compat1.5.2 core-full-compat-yc1.4.5 core-full-compat1.4.5 core-full-nocompat-yc1.4.5 core-full-nocompat1.4.5
- 1.4.2 1.4.1 1.4.0 1.3.0 1.2.0 1.1.0
- 3.7.3 3.7.2 3.7.1 3.7.0 3.7 3.6.2 3.6.1 3.6

引入框架
- 1.4.5 1.4.4 1.4.3 1.4.2 1.4.1 1.4.0 1.3.2
- 1.11.4 1.11.3 1.11.2 1.11.1 1.11.0 1.10.4 1.10.3 1.10.2
- 3.3.6 3.3.5 3.3.0 3.2.0 2.3.2

jerry

HTML代码

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<!doctype html>
<title>无需图片，jQuery+html5实现的超酷loading效果</title>
<body>
<script>
(function(){
	var emptyFn = function(){};
	function Sonic(d) {
		this.data = d.path || d.data;
		this.imageData = [];
		this.multiplier = d.multiplier || 1;
		this.padding = d.padding || 0;
		this.fps = d.fps || 25;
		this.stepsPerFrame = ~~d.stepsPerFrame || 1;
		this.trailLength = d.trailLength || 1;
		this.pointDistance = d.pointDistance || .05;
		this.domClass = d.domClass || 'sonic';
		this.fillColor = d.fillColor || '#FFF';
		this.strokeColor = d.strokeColor || '#FFF';
		this.stepMethod = typeof d.step == 'string' ?
			stepMethods[d.step] :
			d.step || stepMethods.square;
		this._setup = d.setup || emptyFn;
		this._teardown = d.teardown || emptyFn;
		this._preStep = d.preStep || emptyFn;
		this.width = d.width;
		this.height = d.height;
		this.fullWidth = this.width + 2*this.padding;
		this.fullHeight = this.height + 2*this.padding;
		this.domClass = d.domClass || 'sonic';
		this.setup();
	}
	var argTypes = Sonic.argTypes = {
		DIM: 1,
		DEGREE: 2,
		RADIUS: 3,
		OTHER: 0
	};
	var argSignatures = Sonic.argSignatures = {
		arc: [1, 1, 3, 2, 2, 0],
		bezier: [1, 1, 1, 1, 1, 1, 1, 1],
		line: [1,1,1,1]
	};
	var pathMethods = Sonic.pathMethods = {
		bezier: function(t, p0x, p0y, p1x, p1y, c0x, c0y, c1x, c1y) {
			
		    t = 1-t;
		    var i = 1-t,
		        x = t*t,
		        y = i*i,
		        a = x*t,
		        b = 3 * x * i,
		        c = 3 * t * y,
		        d = y * i;
		    return [
		        a * p0x + b * c0x + c * c1x + d * p1x,
		        a * p0y + b * c0y + c * c1y + d * p1y
		    ]
		},
		arc: function(t, cx, cy, radius, start, end) {
		    var point = (end - start) * t + start;
		    var ret = [
		        (Math.cos(point) * radius) + cx,
		        (Math.sin(point) * radius) + cy
		    ];
		    ret.angle = point;
		    ret.t = t;
		    return ret;
		},
		line: function(t, sx, sy, ex, ey) {
			return [
				(ex - sx) * t + sx,
				(ey - sy) * t + sy
			]
		}
	};
	var stepMethods = Sonic.stepMethods = {
		
		square: function(point, i, f, color, alpha) {
			this._.fillRect(point.x - 3, point.y - 3, 6, 6);
		},
		fader: function(point, i, f, color, alpha) {
			this._.beginPath();
			if (this._last) {
				this._.moveTo(this._last.x, this._last.y);
			}
			this._.lineTo(point.x, point.y);
			this._.closePath();
			this._.stroke();
			this._last = point;
		}
	}
	Sonic.prototype = {
		setup: function() {
			var args,
				type,
				method,
				value,
				data = this.data;
			this.canvas = document.createElement('canvas');
			this._ = this.canvas.getContext('2d');
			this.canvas.className = this.domClass;
			this.canvas.height = this.fullHeight;
			this.canvas.width = this.fullWidth;
			this.points = [];
			for (var i = -1, l = data.length; ++i < l;) {
				args = data[i].slice(1);
				method = data[i][0];
				if (method in argSignatures) for (var a = -1, al = args.length; ++a < al;) {
					type = argSignatures[method][a];
					value = args[a];
					switch (type) {
						case argTypes.RADIUS:
							value *= this.multiplier;
							break;
						case argTypes.DIM:
							value *= this.multiplier;
							value += this.padding;
							break;
						case argTypes.DEGREE:
							value *= Math.PI/180;
							break;
					};
					args[a] = value;
				}
				args.unshift(0);
				for (var r, pd = this.pointDistance, t = pd; t <= 1; t += pd) {
					
					// Avoid crap like 0.15000000000000002
					t = Math.round(t*1/pd) / (1/pd);
					args[0] = t;
					r = pathMethods[method].apply(null, args);
					this.points.push({
						x: r[0],
						y: r[1],
						progress: t
					});
				}
			}
			this.frame = 0;
			//this.prep(this.frame);
		},
		prep: function(frame) {
			if (frame in this.imageData) {
				return;
			}
			this._.clearRect(0, 0, this.fullWidth, this.fullHeight);
			
			var points = this.points,
				pointsLength = points.length,
				pd = this.pointDistance,
				point,
				index,
				frameD;
			this._setup();
			for (var i = -1, l = pointsLength*this.trailLength; ++i < l && !this.stopped;) {
				index = frame + i;
				point = points[index] || points[index - pointsLength];
				if (!point) continue;
				this.alpha = Math.round(1000*(i/(l-1)))/1000;
				this._.globalAlpha = this.alpha;
				this._.fillStyle = this.fillColor;
				this._.strokeStyle = this.strokeColor;
				frameD = frame/(this.points.length-1);
				indexD = i/(l-1);
				this._preStep(point, indexD, frameD);
				this.stepMethod(point, indexD, frameD);
			} 
			this._teardown();
			this.imageData[frame] = (
				this._.getImageData(0, 0, this.fullWidth, this.fullWidth)
			);
			return true;
		},
		draw: function() {
			
			if (!this.prep(this.frame)) {
				this._.clearRect(0, 0, this.fullWidth, this.fullWidth);
				this._.putImageData(
					this.imageData[this.frame],
					0, 0
				);
			}
			this.iterateFrame();
		},
		iterateFrame: function() {
			
			this.frame += this.stepsPerFrame;
			if (this.frame >= this.points.length) {
				this.frame = 0;
			}
		},
		play: function() {
			this.stopped = false;
			var hoc = this;
			this.timer = setInterval(function(){
				hoc.draw();
			}, 1000 / this.fps);
		},
		stop: function() {
			this.stopped = true;
			this.timer && clearInterval(this.timer);
		}
	};
	window.Sonic = Sonic;
}());
var colors = ['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet']
var square = new Sonic({
    width: 100,
    height: 100,
    pointDistance: .005,
    trailLength: .9,
    stepsPerFrame: 5,
    setup: function() {
    	this._.lineWidth = 5;
    },
    step: function(point, index, frame) {
		this._.beginPath();
		var color, prev, x, y, angle,
			radius = 45,
			cx = 50,
			cy = 50;
		angle = Math.PI/180 * (point.progress * 360);
		for (var i = -1, l = colors.length; ++i < l;) {
			color = colors[i];
			prev = this['_' + color];
			x = Math.cos(angle) * radius + cx;
			y = Math.sin(angle) * radius + cy;
			this._.fillStyle = color;
			this._.strokeStyle = color;
			this._.beginPath();
			prev && this._.moveTo(prev.x, prev.y);
			this._.lineTo(x, y);
			this._.closePath();
			this._.stroke();
			this['_' + color] = {x:x,y:y};
			radius -= 5;
		}
    },
    path: [
        ['arc', 100, 100, 90, 0, 360]
    ]
});
square.play();
document.body.appendChild(square.canvas);
</script> 
</body>
</html>

CSS代码

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JS代码

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简介

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名称

彩色圆环旋转的HTML5网页加载特效

分类

HTML5代码

描述

彩色圆环旋转的HTML5网页加载特效，也就是网页正在加载其它内容的时候显示的一个动画效果，你可不要认为这是一段Flash，其实它是用HTML5和JS代码生成的，和图片丝毫不沾边，你看看效果就明白了。测试的话，IE8就不行了，使用chrome或火狐...